Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.


Plural of pleura1.


(ploo'ra) plural.pleurae [Gr., side]
Enlarge picture
A serous membrane that enfolds both lungs and is reflected upon the walls of the thorax and diaphragm. The pleurae are moistened with a serous secretion that reduces friction during respiratory movements of the lungs. See: pleural effusion; mediastinum; thorax; illustration

costal pleura

Parietal pleura.

pleura diaphragmatica

The part of the pleura covering the upper surface of the diaphragm.

mediastinal pleura

The portion of the parietal pleura that extends to cover the mediastinum.

parietal pleura

The serous membrane that lines the chest cavity; it extends from the mediastinal roots of the lungs and covers the sides of the pericardium to the chest wall and backward to the spine. The visceral and parietal pleural layers are separated only by a lubricating secretion. These layers may become adherent or separated by air or by blood, pus, or other fluids, when the lungs or chest wall are injured or inflamed.
Synonym: costal pleura

pleura pericardiaca

The portion of the pleura covering the pericardium.

pleura pulmonalis

Visceral pleura.

visceral pleura

The pleura that covers the lungs and enters into and lines the interlobar fissures. It is loose at the base and at the sternal and vertebral borders to allow for lung expansion.

Pleura or pleurae

A delicate membrane that encloses the lungs. The pleura is divided into two areas separated by fluid-the visceral pleura, which covers the lungs, and the parietal pleura, which lines the chest wall and covers the diaphragm.
Mentioned in: Pleural Effusion
References in periodicals archive ?
1997), the glabellar S3 and S2 apodemes reduced to a low knob in the axial furrow (seen ventrally), with no furrows continuing adaxially onto the glabella on the dorsal side, the thorax with fewer segments (nine) but the additional preanterior pair of pleurae on the pygidium being remnant from the juvenile thorax, and the inner two pairs of pleurae reduced but the additional pair developed on the ventral side of the pygidium.
The pleural space is moistened with a fluid that lubricates the pleurae as they slide back and forth on each other during ventilation.
The pleural fluid is often described as causing the two pleurae to adhere to one another like two microscope slides that have a drop of water between them.